Automatic regulator for gas-stoves.



H. JUNKERS.

AUTOMATIC REGULATOR PoR GAS sTovBs.

APPLICATION FILED MAR. 12, 1900.

Patented June-.29, 1909.

8 SHEETS-SHEET 1.

au@ j .W4

H. JUNKERS.

AUTOMATIC REGULATOR FOR GAS STOVES.

APPLICATION FILED MAB.. 12, 1906.

Patented June 29,1909.

8 SHEETS-SHEET 2.

H. JUNKERS.

AUTOMATIC REGULATOR FOR GAS sToVEs.

APPLIOATION FILED MAR. 12, 1900.

Patented IJune 29, 1909 3 SHEETS-SHEET 3.

,5M/Mw" /Ir Amr/meyer UNITED sTATEs I )ATENT OFFICE.

AUTOMATIC REGULATOR FOR GAS-STOVES.

K No. 926,194.

Speccaton of Letters Patent.

Patented June 29, 1909.

Application led March 12, 1906. Serial No. 305,711.

T all whom 'it may concern:

13e it known that I, HUGO JUNKERS, a citizen of the German Empire,residing at Anc-la-Chapelle, Germany, have invented certam new anduseful Im rovements in Automatic Regulators for as-Stoves; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to automatic regulators for gas stoves and hasfor its object the provlslon of means by which the supply of gas to the.burner is automatically controlled y the temperaturel of the articlebeing cooked there and having the further ob- ]ect.1n view ofaccomplishing this result by a device. slmple in construction, effectivein operatlon, and adapted for convenient use. and general application.

T he invention as hereinafter describedand partleularly pointed out inthe claims will be readily understood by reference to the accompanyingdrawings, in which is represented a preferred embodiment of theinvention, together with modifications.

In these drawings: Figure 1 is a side elevation of the device partiallyin section to show the internal construction; Fig. la is a view of thedevice in operative relation to a cooking vessel and a burner; Fig. 1bis a detailv section of the connection between the capsule and theflexible tube Fig. 2 is an enlarged detail of one form of tubularconnection; Fig. 3 is a modified detail of one form of capsule andconnecting tube; Fig. 4 is a fragment of another form of connecting tubewith its protective covering; Fig. 5 is a fragmentary view of one formof connecting tube with Aabraded covering; Fig` 6 is a cross section onthe line 6-6 of Fig. 5; and Figs. 7 to 14 inelusive are views ofdifferent forms of cooking vessels adapted for use in connection withthe device s iown in the preceding figures.

The regulating device shown in Fig. 1 consists of a capsule 1 arrangedto be filled with a suitable Huid sensitive' to changes in temperature,such as ether, alcohol or the like, which capsule is to be brought intosuch relation with the cooking vesse or its contents as to be influencedthereby.

The valve casing 2 is rovided with a tubular stud 3 leading to t e gasburner, while above it is provided with a disk like flange 4 to which issecured by means of screws 5, a

1 cap lnclosing a diaphragm 6 and forming a chamber 7 divided by saiddiaphragm into two parts. Into the lower half of this chamber below thediaphragm leads the gas supply pipe 8. The entrance to the valve casing2 is closed by the valve 9 in the form of a cover upon which rests thediaphragm 6, which valve is supported from below by the spiral s ring1() provided at its lower end with a p ate 11. The lower wall 12 of thevalve casing is erforated to receive the set screw 13 which ears withits up er end against the plate 11 whereby the tension of the spring 12may be closely regulated.

.The upper part of the chamber 7 above the diaphragm 6 1s connected withthe capsule 1 by means of a flexible metal tube 14, of from onethirty-secondth of an inch to one eighth inch in diameter.

The operation of the device is as follows. The capsule 1 is brought intosuchrelation to the cooking vessel or pot that the tempera.- ture of thepot or its contents is transmitted to the contents of the capsule,causing an expansion of the fluid contents of the same corresponding tothe temperature of the c'ontents of the pot. The pressure due to thisexpansion is transmitted through the tube 11 and the dia ihragm 6 to thcvalve 9, pressing the same ownward and throttling to a greater or lessdegree the gas in its passage through the su ppl v pipe S, the valveeasinfr 2, and the stud S to the burner. .It follows that if thetemperature of the cooking vessel and its contents is low, more gas willbc supplied to the burner, while as the temperature ofthe cookingarticle increases, the supply of the gas to the burner will be graduallydecreased, resulting iu a sensitive and perfectly automatic regulationof the heat supplied to the cooking vessel b v the burner.

In order to adapt the device l'or convenient and general use, it isimportant that the connection between the ca isule 1 and the chamber 7should lie a very ight and flexible one, while on thc other hand, itshould be of such a character as not to beeasilv injured in use. Havingthis point in view, the tube is preferably made ol metal having a smalldiameter and its flexibility may be increased b v forming it with spiralexterior grooves 15 as shown in Fig. 2.

To facilitate the handling' ol the capsule, it may advantageously beprovided with a heat insulating handle 1G surrouiuling the tube 14 at ornear itsjunction with the cal -sule 1 as shownin-Fig. 3. In this view,the

I tive means for securing In Figs. 5 and 6, the tube 14 is shown assurrounded by a woven shell of suitable material, such as fine metalwires or the like. c

Ordinarily, the sensitive capsule 1 is made out of metal and the tube 14is connected therewith by soldering. If the capsule 1 is made out ofother material, the connection `between it and the tube w1lll be formedin a correspondingly suitable manner, as for instance, if it is 'ofglass, be by a platinum tube melted into the glass Wrpl of t e capsuleand soldered to the metal tu e. f

While the device s far described might be used by plunging the capsule 1into the midst of the contents of the ot or other cooking vessel, inmany cases this would be undesirable. and it'is found advantageous,therefore, to provide the vessel with a suitable arrangement by which anintimate contact may beeffected between the'vessel and the capsule andthe temperature of the one transferred to the other without materialvariation. For this purpose, the capsule, provided with the handle 20,may be given a flattened form asv shown at 21 in Fig. 7, hollowed out tosnugly fit against the outer wallof the cooking vessel or pot 22, andmay be held tightly against by means of a leaf spring 23. As'analternapot 24 as shown in Figs. 9 and 10 may have its wall thickened atone point in the form of a rib 25, bored out at "26 to receive thecapsule 28 provided with a hand grip 27.

l In Flg. 1-1, the capsule 29 hollowed out similar to that shown inFigs; 7 and 8, 1s provided with a laterally extending hand 30 and isheld snugly against the outer wa lof the pot by means of a spring 31securedthereto and hooked over the upper ed e of the pot.

ccording to Fig. 12, the pot 33 is provided on its outer wall with aprojection 34, bored out horizontally at 35\ to receive a round capsule.

Fig. 13 shows'a pot 36 rovided upon its outer Wall with a horn likeprojection 37 bearing in its upper facev a rest 38v within which thecapsule may rest.

In Fig. 1`4 the pot-39 is'provided Jwith a laterally extending stud 40,over which may be shoved an annular capsule 41 having a laterallyextending tubular connection' 42 and provided with suitable heatinsulating covering or jacket 43. Obviously, the constructive details ofthe regulating device and the forms of cooking the connection mightthewall of the vessel this same result the fiattened and' f interior -ovessels with which the device mightbe used i and the modifiedmethods ofadapting them` for such use might be multiplied indefinitely withoutdeparting from the spirit of my 1nvention as described and hereinafterclaimed. Having thus described'my invention, what I claim as new anddesire to secure by Letters Patent, is: l 1. In an automatic regulatorfor controlling the temperature of a mass being cooked over a gilsburner, the combination of a gas supply pipe, a valve casing therein,lavalvel controlling the flow through lthe casing, a pressure-transmittingdevice within the casing acting on the valve, a capsule containingheat-sensitive fluid, a flexible tube connecting the capsule with thepressure-transmitting device, and means `for securing the capsule inlintimate contact with the cokingy vessel. l

2. The combination with a heat sensitive capsule, a gas supply pipehavinga regulating device, and a iicxible connection between the capsuleand the regulating device, cooking vessel, vand means for securing thecapsule in intimate contact therewith.

` 3. The combination with a heat sensitive,

capsule, a gas supply pipe having a regulating device, and a flexibleconnection between the capsule and the regulating device, of a cookingvessel having itswall arranged to conform closely to the outer contouriof the capsule, and means for securing the two in intimate contact.

4. The combination with a heat sensitive capsule, a gas supply pipehaving a regulating device, Aand a 'fiexible connection between thecapsule and the regulating device, of a cooking vessel havingits wailarranged to conform closely to the outer contour of the capsule, meansfor securing thetwo in intimate contact, and means for protecting thecapsule from eXtraneousYinfluence-s.

5. The combination with the supply pipe ofa gas burner and a valvearranged therein, of a diaphragm bearing upon said valve, a ca sulecontaining a heat sensitive fluid and bein movable independently fromthe gas supp yjpi e, and a connection between the the capsule and achamber formed on the opposite side of the diaphragm from .the valve, a"cooking vessel arranged to be heated by the burner, and means forsecuring the ,capsule in intimate contact with the vesse 6. Thecombination withthe supply pipe of a g'as burner and a valve arrangedtherein, of a diaphragm bearingI upon said-valve, a capsule containing aheat sensitive fluid and bein movable independently from the gasinterior o the capsule and a chamber formedon theppposlite side of thediaphragm from the valve,'a' cooking vessel having its wall-arranged toconform closely to the contour'of 130 the capsule, and means forsecuring the two! iii intimate Contact.

7. The combination with the supply pipe of a gas burner and a valvearranged therein, e of a diaphragm hearing upon said valve, a capsulecontaining a heat sensitive liuid and being movable independently fromthe gas supphv pipe, and a connection between the interior of thecapsule and a chamber formed l on the opposite side of the diaphi'aginfrom the valve, a cooking vessel having its wall arranged to conformsnughv to the contour of the capsule, and means for insulating thecapsule from extraneous inl'hiei-ices of tem- S. The combination of asuppl;v pipe with a gas burner` a valve casing arranged in said supplypipe, a valve controlling the passage through said easing, a springtending to open said valve, a set screw for regulating the tension ofsaid spring, of a diaphragm arranged f within the valve casing andbearing upon the opposite side of the valve from the spring. a capsulearranged to contain a heat sensitive fluid. a liexible metallic tubularconnection l between the interior of the capsule and of the valve casing'above the diaphragm, protecting covering for the flexible metallictubular v connection, and `a non-conductor of heat forming a handle ofthe capsule, a cooking vessel having its wall arranged to conform lcloselyv to the outer contour of the capsule, and means for insulatingthe capsule from l extraneous influences of teni erature other than thatofthe cooking vesse 9. The combination with the suppljv pipe of a gasburner and a valve arranged therein, of a diaphragm bearing upon saidvalve, a capsule containing a heat sensitive fluid. a flexible tubularconnection between the interior of the capsule and a chamber formed onthe opposite side ofthe diaphragm i from the valve. and an insulatingcovering'for the tubular connection.

10. The combination with the su ply pipe of a gas burner and a valvearrange(` therein,

t of a. diaphragm bearing upon said valve, a.

ca )sule containing a heat sensitive fluid, a helieallv grooved metallictubular connection between the interior of the capsule and a chamberformed on the opposite side of the diaphragm from the valve, and aninsulating Covering for the tubular connection.

11. The Combination of a suppltv pipe with a gas burner, a valve casingarranged in said supply pipe` a valve contiolling the passage throughsaid casing, a spring tending to open said valve. a set screw forregulating the tension of said s iring, of a diaphragm arranged withinthe valve easing and bearing upon the opposite side of the valve fromthe spring, a

` capsule arranged to contain a heat sensitive fluid, a lexib e metallictubular ,connection between the interior of the capsule and ot the valvecasing above the diaphragm, an insuf lating covering for the flexibletubular connection, and a non-conductor of heat forming a handle of theca isule.

ln testimony wliereof I hereunto alix my signature' in the presence oftwo witnesses. HUGO JUNKERS. Witnesses WILLIAM J. REUTERS, SIBELLORPORLMAN.

